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I have lithium cells in my laptop more than 11yr old which are working just fine albeit the wattHour capacity has declined.

I don't know the specifications of the Yamaha bike but the battery is not the main problem as it is clearly capable of powering the current motor (albeit total capacity might have reduced). I suspect the maximum torque from the motor is low and inadequate, especially on this old model of e-bike...

Hi mm1, I notice that CambridgeCycleCo.co.uk has stock of 1x Gazelle Orange C7+ Low Step-thru with XS frame size of 46cm at £2199. Need to get in quick if interested as they seem to be out of stock in everything else.

You are welcome. Let us know how you get on.

Hello mm1, the shop I'm thinking of is in Navenby village just south of Lincoln and is called PedalElectricCycles. Need to phone first [01522-255760] to fix an appt because of Covid, and also best to enquire whether he has the specific model(s) you are hoping to try available in the shop. He...

Gazelle are still selling in the UK and if you type "gazelle bikes cambridge" into Google you will see 3 dealers come up near you. I believe their models 'Ami', 'Paris', 'Orange' and 'Grenoble' all come with an option of step thru in XS (extra-small) size - 44cm frame - 'suitable for person...

Hello, look at this thread. http://www.pedelecs.co.uk/forum/threads/kalkhoff-panasonic-charger.32259/ Good luck.

I see that the subject of this discussion was/is "Cheating". Not how an electric bike should be described or what legal terminology is adopted by relevant authorities. "Cheating" is something purely intrinsic to, and in the mind of he/she who says 'it is cheating'. It arises because either...

Thanks for the suggestion. I guess its a trade off whether to lug it along as my new battery is substantially larger capacity wise and should cover most circumstances - if it lives up to its stated capacity rating ... delivered from Germany but in small print says 'Made in China'. Some good...

OK, an update. SUCCESS !! I have managed to get my charger working! Some details of voltage testing of the charger WITHOUT being connected to the battery: After rest overnight without being plugged in -- zero volts across any pair of terminals. On plugging into the mains, intially zero...

Thanks for that suggestion. Firstly, to eliminate misunderstanding (because FLECC has referred to the pins in a different numbering sequence) I have put up below a new photo with pins on my old battery & charger numbered A to E. Pin A on the battery connects into + (POS) for the motor on the...

Thanks very much indeed for that test & info. I take it there is no voltage when plugged into the mains across ANY pair of pins (when the battery is not connected). That still leaves me with the puzzle of WHAT makes the charger want to start delivering a charge. I think I might try opening...

Hmm... Thanks.

Thanks. Will do.

Thanks FLECC. Some useful information there. However I would like to be certain that my charger is faulty (or unfixable) before I throw it away. Do you or anyone else know whether this or similar Kalkhoff/Panasonic '29.3v' chargers should show 29v at the charging terminals when plugged into...

Hello all, I am trying to determine whether a (Kalkhoff)/Panasonic "25v" charger I have is working properly. It is a Panasonic NKJ039 model; stated output "29.3v 1.8A" charger which came with an old Kalkhoff Tasman bike with 25v panasonic motor. I bought a replacement battery last week and it...

This question can be answered with some basic physics. There are two situations - (1) travelling on the flat; and (2) going up any kind of slope however slight. Calculate/convert everything to JOULES (a measure of total energy) and WATTS (a measure of how much energy - joules - is being...

Hello, I have a Panasonic 24v crank drive system on a Kalkhoff Tasman bike. I cannot see any magnets on the rear wheel. Does anyone know how the motor control detects the speed of the bike and where is the road speed sensor located? Does it just measure the crank speed instead and estimate...

Incidentally, Oriteroom, I did successfully bid for these batteries(!) but had to return them because they both had some kind of internal fault as the main output connections (indentified as per Flecc's documentation and also verified on my old battery) only had 2.9 to 3.0v despite being...

Good point Flecc regarding the 20.8aH battery.! Doing the best estimation I can, measuring the likely projection from the one fixed point I have which is the connector slot and stated battery dimensions I reckon it may project at least 6cm, which is at best very very close to hitting the R...